SWITCH KEY IDENTIFICATION (FOR REF. ONLY) ROW / (68, / .055 ±.010 (1,40 ± 0,25)

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1 Standard Sealed Keyboard Colorful Graphic Overlay Audible, Snap-Dome Contact User Legendable Styles 3,000,000 Operations per Button Optional Panel Seal Gasket to 3x4 Keyboard.600 (15, (3,81 R..500 (12,7 (2 EQ. SPS.).128 (3, (7, (19,05 (12, ROW ROW 3-0,25).105 (2, (50, ,25).055 (1, (9,14 3x4.100 (2, (5, (55, (50,8 A B C F G H L M N BUTTON NO (2, OF (55,88) DIM. Dots in the chart indicate connected terminals when switch is closed. Terminals are identified on the keyboard. F E D K J H G 3x4 Matrix Single Pole/Common Bus J E A K F B L G C M H D N Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois USA Phone: Fax:

2 Standard Sealed Keyboard Colorful Graphic Overlay Audible, Snap-Dome Contact User Legendable Styles 3,000,000 Operations per Button Optional Panel Seal Gasket to 4x4 Keyboard.600 (15, (3,81 R..750 (19,05 (12, (12,7 (3 EQ. SPS.) ROW 2 ROW ,25).128 (3, (7, (2,67 COL (63, ,25).055 (1, (9,14 4x (68, (63,5.100 (2,54 BUTTON NO ± (1,27 ± 0,08) (2, (5,08 A B E F G K L M R S T OF (68,58) DIM..220 Dots in the chart indicate connected terminals when switch is closed. Terminals are identified on the keyboard. 4x4 Matrix Single Pole/Common Bus H G F E M L K J P J E A R L F B S M H C T N G D K 30 Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois USA Phone: Fax:

3 Standard Sealed Keyboard Colorful Graphic Overlay Audible, Snap-Dome Contact User Legendable Styles 3,000,000 Operations per Button Optional Panel Seal Gasket to 5x4 Keyboard.600 (15, (3,81 R..500 (12,7 (4 EQ. SPS.).128 (3, (7, (19,05 (12, ROW 2 ROW ,25).105 (2,67 COL (75, ,25) COL (1, (9,14 5x4 Keyboard.100 (2, (81,28 A D E F J K L P Q R U V W OF (8,13) DIM. BUTTON NO (2, Dots in the chart indicate connected terminals when switch is closed. Terminals are identified on the keyboard. 5x4 Matrix P N K G F J L M H Single Pole/Common Bus T P M H D U Q L G C V R K F B W S J E A N Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois USA Phone: Fax:

4 Standard SPECIFICATIONS Materials and Finishes Rating Criteria Rating at 24 Vdc: 10 milliamps, resistive Contact Resistance: Compatible with MOS, TTL and DTL (10 ohms maximum) Voltage Breakdown: 250 Vac between mutually insulated parts Life Expectancy: 3,000,000 operations per button STANDARD LEGENDS Colorful graphic overlays are polyester with a tough acrylic bond to provide maximum protection against dirt and moisture. Second surface printed, the overlay wipes clean and -143 Contact Bounce: Less than 4 milliseconds at make, 10 milliseconds at break Temperature: -40 C to +80 C Operating Features Housing: ABS polycarbonate, black Graphic Overlay: Polyester Contact Dome: Stainless steel, selectively goldplated Terminals: Phosphor bronze Button Travel: 0.015"(0,38 mm) nominal total travel Typical Operating Force: 350 grams continues to look bright and bold throughout the keyboard life. Available through distributors. For instant custom legends, order separate blank keyboards as indicated in the Ordering -152 Information section and choose one of the clear window overlays below; then order a sheet of legend inserts. Or, if you prefer, order the keyboard custom printed by Grayhill; see Ordering Information AB2, 88AC2 88BB2, 88BC2 88JB2, 88JC SEALING OF KEYBOARDS The graphic legend is silk-screen printed on the second surface of a clear polyester film, providing maximum legend protection. It withstands high humidity, and it is resistant to scratching, marring, and dulling of the surface caused by fingernails, wiping cloths, and cleaning materials. It has excellent solvent resistance to water, petroleum oil, alcohols and aliphatic hydrocarbons. detergent solution, soapy water, 30% hydrogen peroxide, wine, beer, whiskey, coffee, cocoa, milk, tomato juice, lemon juice, etc. Hydrocarbons, ketones and freon do not affect the overlay. But, we recommend that you do not subject the keyboard to these chemicals, since they may affect the switch housing, which is ABS plastic. To discuss a particular solvent, contact Grayhill. These common liquids do not attack the overlay: 5% acetic acid, 5% citric acid, 2% Protect your equipment in outdoor or harsh environmental conditions by sealing the 32 Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois keyboard to the equipment panel. Use an optional gasket with the keyboard. There are two types of gaskets: one for mounting the keyboard beneath the panel, and one for mounting it above the equipment panel. See Panel Seal Gaskets. The contact system is internally sealed by a special adhesive backed sheet that holds the domes in position on the PC board USA Phone: Fax:

5 Sealed PANEL SEAL GASKETS Subpanel Mounting Topside Mounting Weatherproof and waterproof your subpanel and topside mounted keyboards with optional panel seal gaskets. Subpanel keyboard gasket is.062" (1,57 mm) thick; topside keyboard gasket is.094" (2,39 mm) (81, (68,83 DIM. A (72,39 DIM. C (63,5 Material is cellulose fiber, foam, nitrile rubber. Order gaskets separately from keyboard. Subpanel 3x4 Part No. 88M Subpanel 4x4 Part No. 88M Subpanel 5x4 Part No. 88M Topside 3x4 Part No. 88M Topside 4x4 Part No. 88M Topside 5x4 Part No. 88M DIM. B DIM. D Size of Subpanel Mount Topside Mount Keyboard Dim. A Dim. B Dim. C Dim. D 3x (51,05 ± 0,.13) (60,96 (45,72 (51,82 4x (63,75 (73,66 (58,42 (64,52 5x (76,45 (86,36 (77,22 INSTANT CUSTOM LEGENDS Available through Distributors Create your own legends using these 3 items: 1) a blank keyboard, 2) the clear window overlays shown on Standard Legend page and 3) a sheet of legend inserts. Blank Keyboards The numbers below order blank keyboards for the user to legend. For description, refer to the part numbering scheme below. The keyboards and overlays are ordered separately. 3x4 Matrix Part No. 88AB2 3x4 SP/Com Bus Part No. 88AC2 4x4 Matrix Part No. 88BB2 4x4 SP/Com Bus Part No. 88BC2 5x4 Matrix Part No. 88JB2 5x4 SP/Com Bus Part No. 88JC2 Legend Insert Sheet and Dry Transfers Self-adhesive inserts are die-cut to fit the button. Legends are printed in black on clear film in News Gothic Condensed type style. They include letters A through Z, numbers 0-69, telephone legends, commonly used words, symbols and blanks. Part No. 87AC2046 Use matching dry transfer lettering on blank inserts of legend sheet: upper and lower case letters, 0-9, and common symbols. Small Print Part No. 87-DT Medium Print Part No. 87-DT Large Print Part No. 87-DT Clear Window Overlays Order separately from keyboards. See also ordering information. 3x4 Overlay Part No x4 Overlay Part No x4 Overlay Part No PRINTED LEGENDS Not available through Distributors. For medium volume applications, or where legends cannot be produced by the self legend method, you can order epoxy ink printed legends. Virtually anything which can be photographed can be printed. Grayhill will print your legend and then add the clear window overlay. Type Simulated Character & Line I.D. No. Style & Size Limitations * 4GH088 1GH125 3GH187 2GH250 ABCDEFGH ABCDE ABCD ABC END DATA LAD ON 15 ORDERING INFORMATION 88AB2 152 Grayhill Series Number Size Option A = 3x4 B = 4x4 J = 5x4 Circuitry Option B2 = Matrix code C2 = Single pole/common bus Standard Legend Choices 3x4 Size: -143, -152, or x4 Size: -052, -072 or x4 Size: -252 or -262 Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill. Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois USA Phone: Fax: